package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void remove(Long id) {
        //添加查询条件,根据id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishqueryWrapper = new LambdaQueryWrapper<>();
        dishqueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishqueryWrapper);

        //如果已经关联,抛出一个异常
        if (count1 > 0){
            throw new CustomException("当前分类关联了菜品,不能删除");
        }

        //查询当前分类是否关联套餐
        LambdaQueryWrapper<Setmeal> setmealqueryWrapper = new LambdaQueryWrapper<>();
        setmealqueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(setmealqueryWrapper);

        //如果已经关联,抛出一个异常
        if (count2 > 0){
            throw new CustomException("当前分类关联了套餐,不能删除");
        }

        //正常删除
        super.removeById(id);
    }
}